{"product_id":"azote-sec-cylindre","title":"Dry Nitrogen – Cylinder","description":"\u003cp\u003e\u003cstrong\u003eDry nitrogen\u003c\/strong\u003e is an inert, moisture-free gas that refrigeration technicians use at two key stages of an installation: while \u003cstrong\u003ebrazing\u003c\/strong\u003e the refrigerant lines, then for the \u003cstrong\u003epressure test\u003c\/strong\u003e before pulling a vacuum. It is always used with a pressure \u003cstrong\u003eregulator\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eBraze under nitrogen, then pressure test\u003c\/h2\u003e\n\u003cp\u003eWhen you heat a copper tube full of air, the inside gets coated with oxide. Those particles break loose later and can clog a filter or an expansion valve. A light flow of dry nitrogen during brazing pushes the air out of the tubes and keeps the inside of the joints clean. Once the lines are connected, the circuit is pressurized with nitrogen: if it holds pressure, it is tight; if it loses pressure, you find the leak before charging the refrigerant.\u003c\/p\u003e\n\u003ch3\u003eBasic rules\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAlways connect the cylinder through a \u003cstrong\u003eregulator\u003c\/strong\u003e, never directly to a line.\u003c\/li\u003e\n\u003cli\u003eSet the test pressure according to the unit manufacturer’s manual, without exceeding it.\u003c\/li\u003e\n\u003cli\u003eNever use \u003cstrong\u003eoxygen\u003c\/strong\u003e or compressed air for a test: oxygen in contact with oil is an explosion hazard, and air brings in moisture.\u003c\/li\u003e\n\u003cli\u003eNitrogen displaces the oxygen in the air: work in a ventilated area.\u003c\/li\u003e\n\u003cli\u003eSecure the cylinder upright and put the valve protection cap back on before moving it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe safety data sheet is supplied with the cylinder by its manufacturer. The cylinder size is confirmed with the quote.\u003c\/p\u003e\n\u003ch2\u003eAvailable from AirGreen across Greater Montréal\u003c\/h2\u003e\n\u003cp\u003eOur refrigeration technicians braze under nitrogen and pressure test every installation in \u003cstrong\u003eMontréal\u003c\/strong\u003e, \u003cstrong\u003eLaval\u003c\/strong\u003e, \u003cstrong\u003eLongueuil\u003c\/strong\u003e, the \u003cstrong\u003eSouth Shore\u003c\/strong\u003e and the \u003cstrong\u003eNorth Shore\u003c\/strong\u003e. RBQ licence 5645-9605-01. To check availability or get a quote, call us at \u003ca href=\"tel:+15143162973\"\u003e514 316-2973\u003c\/a\u003e or email \u003ca href=\"mailto:sales@airgreen.ca\"\u003esales@airgreen.ca\u003c\/a\u003e with the quantity.\u003c\/p\u003e","brand":"AirGreen","offers":[{"title":"Default Title","offer_id":67638658335012,"sku":"AG-RF-004","price":0.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0715\/1694\/6724\/files\/AG-RF-004_00_principale.png?v=1791986082","url":"https:\/\/airgreen.ca\/en\/products\/azote-sec-cylindre","provider":"AirGreen Climatisation \u0026 Chauffage \/ Air Conditioning \u0026 Heating","version":"1.0","type":"link"}